US game in an European PC

Hi,
I am sorry if this has been asked before,but I really am considering getting my hands on FFXI,but I'd rather pay USD $30.00 for the American collection rather than €50.00 for the European one,so I'd like to know if I'll experience any sort of technical difficulties if I stick with the former?
I know I could get my hands on ilegal copies of the game,but I want to pay to enjoy this game...I just think that I should try to get my hands on the american version of the game.
Thank you very much in advance and sorry for bothering you with such(for you) simple questions.
EDIT:I was just browsing Amazon.co.uk and found myself the game selling for 10 quid!That's really something,so I guess I'll be ordering it.

There's no regional encoding limitations for PC games. So any will work. And no, you can't get FFXI illegaly and actually play it.